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Abstract:
We report measurements of quantum oscillations detected in the putative
nematic phase of Sr3Ru2O7. Improvements in sample purity enabled the
resolution of small amplitude de Haas-van Alphen (dHvA) oscillations
between two first order metamagnetic transitions delimiting the phase.
Two distinct frequencies were observed, whose amplitudes follow the
normal Lifshitz-Kosevich profile. Variations of the dHvA frequencies are
explained in terms of a chemical potential shift produced by reaching a
peak in the density of states, and an anomalous field dependence of the
oscillatory amplitude provides information on domains.
